CVE-2025-14921

High

Description

Hugging Face Transformers Transformer-XL Model Deserialization of Untrusted Data Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Hugging Face Transformers. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the parsing of model files. The issue results from the lack of proper validation of user-supplied data, which can result in deserialization of untrusted data. An attacker can leverage this vulnerability to execute code in the context of the current user. Was ZDI-CAN-25424.

SeverityHigh
CVSS7.8
Exploit probability—
ProductHuggingface Transformers
PublishedDec 23, 2025
First seenDec 23, 2025

How to fix

Sources list no fixed version or patch link for this vulnerability.

Affected products

ProductAffected versionsFixed in
huggingface transformers4.54.1—
transformersPyPIv ≤ 4.54.1—

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CVE-2025-14921 · Huggingface Transformers · Dark Radar